c语言之pkcs7填充与去填充处理

int pkcs7_pad(const uint8_t* input, size_t input_len, uint8_t* output, size_t* output_len){size_t pad_len = 16 -(input_len%16);memcpy(output,input,input_len);for(size_t i = 0;i < pad_len;